U.S. stocks closed on Friday with modest losses, as a big drop in energy stocks offsets gains in other parts of the market. For the day: The Dow Jones industrial average fell 56.12 points, or 0.3 percent, to 17,689.86. The Standard & Poor's 500 index ...

Today, the Dow Jones Industrial Average fell 163 points on the day, extending the index's losing streak to four days. A sharp decline in materials and healthcare stocks and a decline in commodity prices offset strong earnings reports by Amazon.